Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7b0a0a5ba48053…

MALICIOUS

PDF

76.2 KB Created: 2021-07-13 16:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 08e9e6f70b02d33dc738fce62302264c SHA-1: 8e23a787ce349d0a7713e4c85aa2dbb1295a127f SHA-256: bb7b0a0a5ba48053d39967747b2e44e89f73bc7d40f52abff66f01d8d5b30325
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or redirection scheme. The document body is unreadable binary data, but the heuristics indicate a link farm designed to lead users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7328

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3aa24rofsgr96qaos8uc9dc3k0/vuderixivug.pdf In PDF document text
    • https://sasalidayanisma.org/uploads/file/femikamolamamezurifof.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/61629524454.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xopazonuludapiwumiso.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/10864596470.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/dl4qhpksppho7ndq7ed11907de/rudimimojaju.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/8714678008.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/82399264649.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aea8ebc87---12306875930.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/k8dp8frj9hqv4gj2oe7e5e0s76/tedonanufuletanesanekav.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846d803750f---muxolomerozobigemi.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a072bb4c7f4---41988388055.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/regigifugajigomabeni.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b2f16dbf5---jexewojiravizenome.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/kegezodokavexi.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8032e2e798---duteronakisabiliro.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0087c5fd8---sexave.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/67910630713.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/mamavuratafijimefujizomed.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/furelenipobere.pdfIn PDF document text
    • http://canadanur.com/resimler/files/pevemu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a96db491679---borotamalajipifaxunow.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4cd01d60e---ludodugojilironipasudafib.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/jikofisor.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/tixulobugivefa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=german+with+jenny+a1+exercises+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 11240 bytes
SHA-256: df7c3a6484e74d65a23f561e78886ae9f9a9a98fe32a980b7bae00ca75db1e38